Hayabusa Classic 12'' Sphere Double End BallHayabusa Classic 12'' Sphere Double End Ball The perfect tool for developing core boxing skills. The Classic 12 Double End Bag features a traditional spherical shape thats excellent for maintaining consistent rhythm while honing your technique. Pre equipped shock cords offer rapid rebound elasticity made to sharpen your hand eye coordination, punch speed, and timing. Its quick setup and take down make this one of the most practical and versatile tools